Improvement in engine-governors



ZShets-Sheetl. G. W. HALL & A. 0. WHITTEMORE.

ENGINE-GOVERNOR. I No.17Z,--116. Patent'ed J'an.1l,18'76.

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INVEN'TORS 59m 6/. 6M4, WM

ATTORNEYS N. PETERS, PHOTO-LITHOGRAPHEE WAEWNGTON. D C.

ZSheetw-ShetZ. G, W. HALL & A. O. WHITTEMORE.

ENGINE-GOVERNOR. N'0.17Z,116. V Patented Jan.11,18"76.

N-FETERS PMOTO-LITHOGRAPHER, WASNIMGTON. D C.

1), formed therein.

- UNITED STATES PATE OEEIoE.

GORDON W. HALL AND ALBERT O. WHITTEMOBE, OF HAVANA, NEW YORK. I

IMP ROVEMENT IN ENGINE-GOVERNORS.

Specification forming part of Letters Patent No. 172,1 16, dated January11, 1876; app ication filed July 17, 1875.

To all whom it my concern:

Be it known that we, GORDON W. HALL and ALBERT 0. WHITTEMO E, of Havana,in the county of Schuyler and State of New York, have invented a new andvaluable Improvement in Steam-Engine Governors; and we do hereby declarethat the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexeddrawings, making a part of this specification, and to the letters andfigures of reference marked thereon.

. Figure l of the drawing is a representation of a horizontal section ofour steam-engine governor, and Fig. 2 is a vertical sectional view ofthe same. Fig. 3 is a plan view, and Fig. 4 a side view, thereof.

Our invention relates to governors for steamengines; and it consists ina movable eccentric for operating the slide-valve, and provided with acog-wheel within the governor-case, the hinged weights geared to saidcog-wheel, and the coiled spring connecting the eccentric with thegovernor-case.

In the annexed drawing, A represents 'the main shaft of the engine, uponwhich is rigidly. fastened a governor-case, B, provided with anadjustableface-plate, G, held in any position desired to the case byscrews or other suitable means. D remesents the eccentric, whichoperates the slide-valve of the engine by means of the connecting-rod 1.This eccentric is placed loosely on the shaft A, and is formed, with anelongated hub, a, which extends into the case B, and has a cog-wheel,

The position of the movable or loose eccentric D on the shaft A iscontrolled by the governor. Attached to the hub of the movable eccentricD is a fly-wheel, E, or its equivalent, to steady the motion thereof,

as without this the eccentric would have an unequal motion at differentpoints of its revolution occasioned by friction of the parts or othercauses. G is a coil-spring, wound around the hub of the eccentric, andhaving its inner end secured to the same, while the outer end is securedto the faceplate G of the governorcase. By turning the face-plate andfasten ing at any point desired the tension of the spring G isregulated, thereby regulating the speed of the engine, as the governorthereby becomes set to a certain speed. Within the casing B are hingedtwo weighted arms, H H, the outer weighted ends of which are providedwith rack-bars d d, gearing with the pinion b on the hub of theeccentric. These arms are used in lieu of the ordinary governor-balls,

and thrown out by the momentum of the case, the rack-bars of whichengage with the pinion on the elongated sleeve, thereby regulating thecut-off valve through the medium of the connecting-rod I. Thegovernor-sprin g G being set by means of the adjustable face-plate O tothe desired tension, and the engine being in operation, as long as itruns up to or below the speed for which the spring is set the eccentricmoves regularly with the shaft, it being connected thereto by the springand governor-case; but as soon as the speed increases the least trifiebeyond said point the mo vement ot'the movable eccentric is changed, soas to restrLt the movement of the cut-off valve, and thus admit thesteam into the cylinder at a difl'erent point of the stroke, and therebyat once decreasing the speed.

What we claim as new, and desire to secure by Letters Patent, is--- l.The loosely-movable eccentric D, having the elongated hub a andcog-wheel b, in combination with the governor, substantially asdescribed.

2. The casing B and weighted armsH, provided at their outer ends withrack-bars d, in

combination with the pinion b of the ecccentrio, substantially as andfor the purpose set forth.

In testimony that we claim the above we have hereunto subscribed ournames in the presence of two witnesses.

GORDON W. HALL. ALBERT O. WHITTEMORE.

Witnesses ELBERT P. 000K, M. D. CARPENTER.

